Asked by Mannat

Two lights flash every 15 and 45 seconds respectively.If the two lights flashed together at 3 p.m.,at what time will they flash together next time?
Answered by Reiny
Very simple, since the LCM of 15 and 45 is 45, they will flash in unison every 45 seconds, so add 45 sec to 3 pm or
3:00:45 pm
Answered by Swasti
Why we have done LCM nd not ised HCF for this??
Answered by Aabdullah
This answer is very very tati
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